Improved sheet-metal-cutting machine



UNrrEn SEMES ArENr SEYMOUR B. FITCH, OF VALTON, NEV YORK.

IMPROVED SHEET-METAL-CUTTING MACHINE.

Specification forming part of Letters Patent No 107,351, dated September 13, 1870.

To @ZZ whom, it may concern:

Beit known. that 1I, SEYMOUR B. FrToH, of Valton, in the county of Delaware and State: of N ew York, have invented a new and Improved Machine for Cutting Round .Flaring` Dishes; and I do hereby declare the followingl to bea full and exact description thereof, ref' erence being had to the accompanying drawings, making part of this speciiication, in which- Figure 1 represents a top view of the machine; Fig. 2, au end elevation of the same; Fig. 3, a side elevation, and Fig. 4 a top view, of the machine with moving table in position, having on it a piece of metal in readiness to pass through the knives; also a bed-plate, F, having a gage-piece, f, for the ruimer I to be guided against, the said ruimer being in posil tion, with a piece of metal in readiness to pass i through the knives. Fig. 5 represents a top view of the machine with the stationary table M in position., and the slide O having on it a piece of metal in readiness to pass through the knives.

In all the figures similar letters of reference indicate corresponding parts.

A represents the bed-plate or base of the machine; B, overhanging and returning arms, which carry the upper and lower circular knives; C, circular knives, upper and lower; c, shaft to circular knives; D, rest-blocks for giving a sufficient height to the under side of bedplate F; d, slides attached to the restblocks, for the purpose of adjusting bed-plate F; E, slides fastened to the bed-plate F,which pass at right angles to those in the restblocks; e, set-screws and nuts for adjusting the bedplate F in its position; F, bed-plate passing through between the upper and lower arms, B; j', guide of proper radius attached to bedplate F; G, moving table fastened by a pivot to rest-block; g, screws in moving table, to hold metal in position; H, sheet of metal in position on table G; h, dotted line denoting cut made in metallic plate when passed through the knives; I, runner working against then gage-piece f on bed-plate F; K, metal in po sition on runner I; k, screw in runner I, to hold metal in position; L, dotted line denoting cut made in metal when passed through the knives; M, bed of fixed table; N, outside guides on fixed table; a, inside guides to sliding table O; O, sliding table; o, guide-screws on sliding table; I), metallic plate infposition on sliding table before being passed lthrough the knives; R, rest-block, having projecting arms; o i', arms on rest-block.

The nature of myinvcntion consists in a mar- Mpg chine having several combinations, for the purpose of cutting the segments of metal required to form round iaring dishes, such as pans, basins, &c.

To enable others skilled .in the art to make and use my invention, I will proceed to de scribe its construction and operation.

I construct a bed-plate or base of suitable material, and raise upon it an overhanging and returning arm constructed as a U, laid upon its side, and at the open end suitable attachments to carry the circular knives and their shafts, these knives being sovadjusted that they are one above theot-her, and slightly overlapping each. other, thereby forming shears. On either side of these arms are restblocks, for giving sufficient height to the bedplate F and runner I, that the metal in position upon the runner should come in contact with the knives at equal distances from the center of each knife, this determining the height of the block and thickness of the bed-r plate and runner.

To adjust the bed-plate F, one of the blocks is provided with slides d, nut and set-screw e, immediately in frcntof the overhanging arms which carry the knives, and upon the same center line a rest-block, It, having projecting arms v', should be placed, the height of which is determined by the thickness of the pieces to be placed upon it, and governed by the same conditions as those in the case of the rest= b cks D.

he construction of the moving table is to have, 4of suitable material, an oblong block, rounded off as shown. rlhis round is struck in accordance to the sweep that is to be given by the radius that is required in cutting the metal. Screws are placed in the top of this block to act as guides and to hold the metal while being cut oif into proper lengths. The construction of this sliding table O and the iiXture on which it works: A firm piece is constructed, with two guides on the outer edge. These guides will be at right angles to the circular knives when in position on machine. The slide then has guides on its under side, and which will run between the outer guides,

causing the table to work directly in front of the knives. Screws are provided in this upper table, to act as guides to the metal being cut.

The construction of the bed-plate F is av desired circle 5 then place my metal plate on fthe table, it being held in position by the screws y, and allowing it to merely round the end ofthe sheet the first cut, sufficient screws being provided, in accordance with the number of l'sections the metal will allow. cuts the top oft' the first section.

This operation Then move the metal up and secure it in the next set of screws, which are already in the board under the metal. Then propel it through the shears.

-This cuts off the rst section and top ofl the second. Continuing this operation for as many sections as the sheet will make, this finishes as far as this part of the machine can do, leaving the last section as shown Fig. 4, letter K. Then remove this table and place the straight sliding table in position, securing it to the arms 1'; place the section on the sliding table at the desired angle to correspond with lines radiating from the center of the circle, holding it in position by screws g, as in the first operation. The sliding table is passed in front of the knives, and the metallic section cut oft'. The section is then turned over end forend, and again cut. all but cutting out the piece at the bottom. The bed-plate F, which is securely fastened in its position on the other side of the knives, is then usedto complete. A gage-piece of the same circle as the outside of the section, and against which the runner slides, securely holds the metallic section in position, and the bottom is cut off.

Having thus fully described the nature and operation of my inventiomwhat I claim as new, and desire to secure by Letters Patent, is

l. The combination of the base-plate A, arms B, circular knives C, and their shafts c c, rest-block D, bed-plate F, slide d, andsetscrews e, when constructed, arranged, and operating in the manner and for the purpose herein set forth and described.

2. In combination with the above, gagef and runner I, when constructed, arranged,

and operating as herein described.

3. The improved machine herein described, consisting of the several parts named in the foregoing clauses of claim, the bed `M, and alternative devices M and G, and table O, as specified.

In testimony that I claim the foregoing machine I have hereunto set my hand this 14th day of February, 1870.

S. B. FITCH.

Witnesses NATHAN C.' lVoon, M. XV. MARVIN.

This completes the section 

